Southwest Alaska's Bristol Bay houses the world's last great Sockeye salmon fishery. The region is also rich in an estimated $300 billion of precious mineral deposits. With foreign companies jockeying to create an enormous open-pit mine at Bristol Bay's headwaters, the battle lines for an explosive political confrontation between competing interests are drawn, as compellingly chronicled in this "Frontline" installment. 60 min. Widescreen; Soundtrack: English Dolby Digital stereo.